The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 22, 2014
Filed:
Feb. 26, 2010
Shigeru Hirata, Kanagawa, JP;
Yuji Ikegami, Kanagawa, JP;
Kazuhiro Yamakawa, Kanagawa, JP;
Nippon Yakin Kogyo Co., Ltd., Tokyo, JP;
Abstract
As a stainless steel for a metal part for clothing ornament capable of working into a complicated form part and having such nonmagnetic properties that the worked part can cope with the detection through needle detecting device is provided a high-Mn austenitic stainless steel having a chemical composition comprising C: 0.02-0.12 mass %, Si: 0.05-1.5 mass %, Mn: 10.0-22.0 mass %, S: not more than 0.03 mass %, Ni: 4.0-12.0 mass %, Cr: 14.0-25.0 mass % and N: 0.07-0.17 mass %, provided that these components are contained so that δ cal (mass %) represented by the following equation (1) is not more than 5.5 mass %:δ cal (mass %)=(Cr+0.48Si+1.21Mo+2.2(V+Ti)+0.15Nb)−(Ni+0.47Cu+0.11Mn−0.0101Mn+26.4C+20.1N)−4.7  (1)and having a magnetic permeability of not more than 1.003 under a magnetic field of 200 kA/m.